EP2279184B1 - Indole als modulatoren des alpha-7-nikotinacetylcholinrezeptors - Google Patents

Indole als modulatoren des alpha-7-nikotinacetylcholinrezeptors Download PDF

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Publication number
EP2279184B1
EP2279184B1 EP09733402A EP09733402A EP2279184B1 EP 2279184 B1 EP2279184 B1 EP 2279184B1 EP 09733402 A EP09733402 A EP 09733402A EP 09733402 A EP09733402 A EP 09733402A EP 2279184 B1 EP2279184 B1 EP 2279184B1
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Prior art keywords
disorder
compound
trifluoromethyl
methyl
salt
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French (fr)
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EP2279184A1 (de
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Kevin Dinnell
Andrew P. Lightfoot
Howard Robert Marshall
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BenevolentAI Cambridge Ltd
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Proximagen Ltd
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Priority claimed from GB0810229A external-priority patent/GB0810229D0/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Definitions

  • This invention relates to novel indole derivatives having activity in modulation of the ⁇ 7 nicotinic acetylcholine receptor (nAChR).
  • the invention also relates to the use of the derivatives in treating diseases and conditions mediated by modulation of the ⁇ 7 nAChR.
  • the invention relates to compositions containing the derivatives and processes for their preparation.
  • the central nervous system (CNS) contains two types of ACh receptor, muscarinic receptors and nAChRs.
  • nAChRs are ligand-gated ion channels containing five subunits (for reviews, see Colquhon et al. (1997) Advances in Pharmacology 39, 191-220 ; Williams et al. (1994) Drug News & Perspectives 7, 205-223 ; Doherty et al. (1995) Annual reports in Medicinal Chemistry 30, 41-50 ).
  • the nAChR gene family can be divided into two groups: those coding for ⁇ subunits and those coding for ⁇ subunits (for reviews, see Karlin & Akabas (1995) Neuron 15, 1231-1244 ; Sargent (1993) Annu. Rev. Neurosci. 16, 403-443 ). Three of the ⁇ subunits, ⁇ 7, ⁇ 8 and ⁇ 9, can form functional receptors when expressed alone and form homooligomeric receptors.
  • Nicotine has been reported to normalise the deficits in both lesioned animals and in-bred mouse strains, again with a pharmacology compatible with activity at the ⁇ 7 receptor.
  • Pharmacological blockade of ⁇ 7 receptors has been reported to impair rodent short-term working memory, whilst receptor activation has been reported to enhance performance in the same paradigm, thus implicating ⁇ 7 receptors as a target for cognitive enhancement.
  • ⁇ 7 nAChRs are characterised by their fast activation kinetics and high permeability to Ca 2+ compared to other subtypes ( Delbono et al. J. Pharmacol. Exp. Ther. 1997, 280, 428-438 .) and exhibit rapid desensitization following exposure to agonists. ( Castro et al., Neurosci. Lett. 1993, 164, 137-140 , Couturier et al., Neuron 1990, 5, 847-856 , Alkondon et al., J. Pharmacol. Exp. Ther. 1994, 271, 494-506 ).
  • Treatment with ⁇ 7 agonists may therefore be problematic because both acetylcholine and nicotine both show activation followed by blockade and/or desensitisation of the receptor and hence chronic treatment with an agonist may well result in apparent antagonism.
  • agonists have been shown to exhibit highest affinity for the desensitised state of the receptor and can, thus, mediate receptor desensitisation at concentrations below the threshold for receptor activation ( Briggs and McKenna. Neuropharmacology 1998 37,1095-1102 ).
  • PAMs enhance ⁇ 7 nAChR activation mediated by endogenous or exogenous agonists without activating the receptor in their own right, i.e. in the absence of agonist.
  • a number of PAMs have been reported ( Lightfoot et al. Progress in medicinal chemistry 46:131-71, 2008 ) WO 0132619 describes indole compounds as allosteric modulator of the nicotine receptor.
  • the invention provides a compound of formula (I) or a salt thereof: wherein
  • a C 1-6 alkyl substituent is a univalent radical derived by removal of a hydrogen atom from an acyclic C 1-6 alkane.
  • Such C 1-6 alkyl substituents include methyl and ethyl, may be straight chain (i.e. n-propyl, n-butyl, n-pentyl and n-hexyl) or branched chain (for example, isopropyl, isobutyl, secbutyl, tert-butyl, isopentyl and neopentyl).
  • a halo substituent refers to fluoro, chloro, bromo and iodo radicals. In an embodiment, unless otherwise indicated, any halo substituent is chloro or bromo.
  • a haloC 1-6 alkyl substituent is a C 1-6 alkyl group substituted by one or more halo substituents, which halo substituents may be the same or different.
  • Such C 1-6 haloalkyl substituents include monofluoromethyl, difiluoromethyl, trifluoromethyl and 1-chloro-2-fluoroethyl.
  • a C 1-6 alkoxy substituent is group of formula "R-O-" where R is C 1-6 alkyl as defined above.
  • alkoxy substituents include methoxy and ethoxy and may be straight chain (i.e. n-propoxy, n-butoxy, n-pentoxy and n-hexyloxy) or branched chain (for example, isopropoxy, isobutoxy, secbutoxy, tert-butoxy, isopentoxy and neopentoxy).
  • a haloC 1-6 alkoxy substituent is of formula "R x -O-" where R x is C 1-6 haloalkyl as defined above.
  • Such C 1-6 haloalkoxy substituents include monofluoromethoxy, difluoromethoxy, trifluoromethoxy and 1-chloro-2-fluoroethoxy and may be straight chain or branched chain.
  • R 1 is hydrogen
  • R 2 is hydrogen
  • R 1 and R 2 are hydrogen.
  • R a is bromo, chloro, methyl, methoxy, ethoxy, trifluoromethyl, trifluoroethoxy or cyano.
  • R a is bromo, methyl, methoxy, ethoxy, trifluoromethyl, trifluoroethoxy or cyano.
  • R a is trifluoromethyl.
  • the compound is selected from:
  • the compound is N-[(2-trifluoromethyl-1H-indol-5-yl)methyl]-6-(trifluoromethyl)-3-pyridinecarboxamide.
  • substituted means substituted by one or more defined groups.
  • groups may be selected from a number of alternative groups, the selected groups may be the same or different.
  • the compounds of formula (I) may form pharmaceutically acceptable salts, for example, non-toxic acid addition salts formed with inorganic acids such as hydrochloric, hydrobromic, hydroiodic, sulfuric and phosphoric acid, with carboxylic acids or with organo-sulfonic acids.
  • inorganic acids such as hydrochloric, hydrobromic, hydroiodic, sulfuric and phosphoric acid
  • carboxylic acids or with organo-sulfonic acids.
  • Examples include the HCl, HBr, HI, sulfate or bisulfate, nitrate, phosphate or hydrogen phosphate, acetate, benzoate, succinate, saccharate, fumarate, maleate, lactate, citrate, tartrate, gluconate, camsylate, methanesulfonate, ethanesulfonate, benzenesulfonate, p-toluenesulfonate and pamoate salts.
  • suitable pharmaceutical salts see Berge et al, J.
  • the salt of the compound of formula (I) is a pharmaceutically acceptable salt.
  • the compounds of the invention are typically in solid form.
  • the compounds of the invention may exist in crystalline or noncrystalline form, or as a mixture thereof.
  • pharmaceutically acceptable solvates may be formed wherein solvent molecules are incorporated into the crystalline lattice during crystallization.
  • Solvates may involve nonaqueous solvents such as ethanol, isopropanol, DMSO, acetic acid, ethanolamine, and EtOAc, or they may involve water as the solvent that is incorporated into the crystalline lattice.
  • Solvates wherein water is the solvent that is incorporated into the crystalline lattice are typically referred to as "hydrates". Hydrates include stoichiometric hydrates as well as compositions containing variable amounts of water. The invention includes all such solvates.
  • polymorphs may exhibit polymorphism (i.e. the capacity to occur in different crystalline structures). These different crystalline forms are typically known as "polymorphs.”
  • the invention includes all such polymorphs. Polymorphs have the same chemical composition but differ in packing, geometrical arrangement, and other descriptive properties of the crystalline solid state. Polymorphs, therefore, may have different physical properties such as shape, density, hardness, deformability, stability, and dissolution properties. Polymorphs typically exhibit different melting points, IR spectra, and X-ray powder diffraction patterns, which may be used for identification.
  • polymorphs may be produced, for example, by changing or adjusting the reaction conditions or reagents, used in making the compound. For example, changes in temperature, pressure, or solvent may result in polymorphs. In addition, one polymorph may spontaneously convert to another polymorph under certain conditions.
  • the present invention provides N-[(2-trifluoromethyl-1H-indol-5-yl)methyl]-6-(trifluoromethyl)-3-pyridinecarboxamide in crystalline form.
  • the present invention provides crystalline N-[(2-trifluoromethyl-1 H-indol-5-yl)methyl]-6-(trifluoromethyl)-3-pyridinecarboxamide characterised in that it provides an XRPD pattern substantially in accordance with Figure 1 .
  • the present invention provides crystalline N-[(2-trifluoromethyl-1 H-indol-5-yl)methyl]-6-(trifluoromethyl)-3-pyridinecarboxamide characterised in that it provides an XRPD pattern comprising peaks substantially as set out in Table 1.
  • the present invention provides crystalline N-[(2-trifluoromethyl-1 H-indol-5-yl)methyl]-6-(trifluoromethyl)-3-pyridinecarboxamide characterised in that it provides a Raman spectrum substantially in accordance with Figure 2 . Therefore, according to a further aspect, the invention provides a solvate, hydrate, prodrug or polymorph of the compounds of the invention.
  • Certain compounds of the invention may exist in one or more tautomeric forms. All tautomers and mixtures thereof are included in the scope of the present invention.
  • Certain compounds of the invention may possess one or more chiral centres and so exist in a number of stereoisomeric forms.
  • Compounds having one chiral centre may exist as enantiomers or a racemic mixture containing enantiomers.
  • Compounds having two or more chiral centres may exist as diastereoismomers or enantiomers. All stereoisomers (for example enantiomers and diastereoisomers) and mixtures thereof are included in the scope of the present invention.
  • Racemic mixtures may be separated to give their individual enantiomer using preparative HPLC using a column with a chiral stationary phase or resolved to yield individual enantiomers utilising methods known to those skilled in the art.
  • chiral intermediate compounds may be resolved and used to prepare individual enantiomers.
  • the invention also includes all suitable isotopic variations of the compounds of the invention.
  • An isotopic variation of the compound of the invention is defined as one in which at least one atom is replaced by an atom having the same atomic number but an atomic mass different from the atomic mass usually found in nature.
  • isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, sulphur, fluorine and chlorine such as 2 H, 3 H, 13 C, 14 C, 15 N, 17 O, 18 O, 35 S, 18 F and 36 Cl respectively.
  • Certain isotopic variations of the invention for example, those in which a radioactive isotope such as 3 H or 14 C is incorporated, are useful in drug and/or substrate tissue distribution studies.
  • Tritiated, i.e., 3 H, and carbon-14, i.e., 14 C, isotopes are particularly preferred for their ease of preparation and detectability. Further, substitution with isotopes such as deuterium, i.e., 2 H, may afford certain therapeutic advantages resulting from greater metabolic stability, for example, increased in vivo half-life or reduced dosage requirements and hence may be preferred in some circumstances.
  • isotopic variations of the compounds of the invention can generally be prepared by conventional procedures such as by the illustrative methods or by the preparations described in the Examples and Preparations hereafter using appropriate isotopic variations of suitable reagents.
  • Compounds of formula (I) may be prepared according to scheme 1 by coupling compounds of formula (II) with compounds of formula (III).
  • Typical conditions comprise treatment with a suitable coupling agent, such as HATU, HOBt, DCC in a suitable solvent such as DCM or DMF can be used.
  • Alternative conditions comprise conversion of the carboxylic acid (II) to the corresponding acyl chloride, using oxalyl chloride in a suitable solvent (such as THF or DCM) with a suitable base (such as triethylamine).
  • compounds of formula (I) may be prepared from other compounds of formula (I).
  • compounds of formula (Ia) where R 2 is cyano may be prepared from compounds of formula (Ib), where R 2 is bromo, by reaction with zinc cyanide with a suitable catalyst in a suitable solvent.
  • Treating compounds of formula (VI) with a phosphine derivative gives compounds of formula (VII), which may be cyclised to give compounds of formula (VIII).
  • Typical cyclisation conditions comprise heating in a suitable solvent (such as DMF) to a temperature in excess of 100°C.
  • Compounds of formula (III) are obtained by reduction of compounds of formula (VIII) with borane or nickel borohydride.
  • Compounds of formula (IIIb), i.e. compounds of formula (III) where R 1 is C 1-3 alkyl, may be prepared according to reaction scheme 4 by reacting compounds of formula (VIII) with a suitable alkyl halide (such as methyl iodide) in the presence of a base (such as sodium hydride) in a suitable solvent (such as DMF) followed by reduction using borane or nickel borohydride.
  • a suitable alkyl halide such as methyl iodide
  • a base such as sodium hydride
  • a suitable solvent such as DMF
  • Salts may be prepared conventionally by reaction with the appropriate acid or acid derivative.
  • the compounds of the invention may be useful for the treatment of diseases and conditions mediated by positive allosteric modulation of the ⁇ 7 nAChR or diseases and conditions which are associated with modulation of the ⁇ 7 nAChR.
  • Diseases or conditions mediated by positive allosteric modulation of the ⁇ 7 nAChR or diseases and conditions which are associated with modulation of the ⁇ 7 nAChR include (the numbers in brackets after the listed diseases below refer to the classification code in Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, published by the American Psychiatric Association (DSM-IV) and/or the International Classification of Diseases, 10th Edition (ICD-10 ):
  • the compounds of the invention may also be useful in treating inflammation, inflammatory pain, rheumatoid arthritis and sepsis.
  • the patient is a human.
  • treatment includes prophylaxis, treatment of symptoms and/or treatment of the underlying causes of symptoms where this is appropriate for the relevant condition(s).
  • the present invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use as a medicament.
  • the present invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use in treating a disease which is associated with a reduction in function of ⁇ 7 nicotinic acetylcholine receptor.
  • the present invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use in treating a disease which benefits from positive allosteric modulation of the ⁇ 7 nicotinic acetylcholine receptor.
  • the present invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use as a positive allosteric modulator of the ⁇ 7 nicotinic acetylcholine receptor.
  • the invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use in the treatment of a psychotic disorder.
  • the invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use in the treatment of schizophrenia.
  • the invention provides a compound of formula (I) as hereinbefore described or a salt thereof for use in the treatment of anxiety or depression.
  • the invention also provides a compound of formula (I) as hereinbefore described or a salt thereof for use in the treatment of cognitive impairment.
  • the invention also provides a compound of formula (I) as hereinbefore described or a salt thereof for use in the treatment of Alzheimer's disease.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for treating a disease which is associated with a reduction in function of ⁇ 7 nicotinic acetylcholine receptor.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for use in treating a disease which benefits from positive allosteric modulation of the ⁇ 7 nicotinic acetylcholine receptor.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for the positive allosteric modulation of the ⁇ 7 nicotinic acetylcholine receptor.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for use in the treatment of a psychotic disorder.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for use in the treatment of schizophrenia.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for use in the treatment of anxiety or depression.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for use in the treatment of cognitive impairment.
  • the invention provides the use of a compound of formula (I) as hereinbefore described or a salt thereof in the manufacture of a medicament for use in the treatment of Alzheimer's disease.
  • the invention discloses a method of treating a disease which is associated with a reduction in function of ⁇ 7 nicotinic acetylcholine receptor, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the present invention discloses a method of treating a disease which benefits from positive allosteric modulation of the ⁇ 7 nicotinic acetylcholine receptor, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the present invention discloses a method for the positive allosteric modulation of the ⁇ 7 nicotinic acetylcholine receptor, which comprises administering to a human an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the invention discloses a method for use in treating a psychotic disorder, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the invention discloses a method for treating schizophrenia, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the invention discloses a method for treating anxiety or depression, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the invention also discloses a method for treating cognitive impairment, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • the invention also discloses a method for treating Alzheimer's disease, which comprises administering to a human in need thereof an effective amount of a compound of formula (I) as hereinbefore described or a salt thereof.
  • compounds of formula (I) or a salt thereof may be administered in doses ranging from about 0.1 mg to about 1000 mg per day, in single or divided doses (i.e., from 1 to 4 doses per day), although variations will necessarily occur depending upon the species, weight, age and condition of the subject being treated, as well as the particular route of administration chosen.
  • the dose is administered once daily.
  • the dosage level is in the range of about 0.1 mg/kg to about 500 mg/kg body weight per day.
  • the dosage level is in the range of about 0.1 mg/kg to about 100 mg/kg body weight per day.
  • the compounds of formula (I) and their salts thereof may also be suitable for combination with other actives, such as typical and atypical antipsychotics, mood stabilisers, antidepressants, anxiolytics, drugs for extrapyramidal side effects and cognitive enhancers to provide improved treatment of psychotic disorders.
  • actives such as typical and atypical antipsychotics, mood stabilisers, antidepressants, anxiolytics, drugs for extrapyramidal side effects and cognitive enhancers to provide improved treatment of psychotic disorders.
  • adjunctive administration is meant the coterminous or overlapping administration of each of the components in the form of separate pharmaceutical compositions or devices.
  • This regime of therapeutic administration of two or more therapeutic agents is referred to generally by those skilled in the art and herein as adjunctive therapeutic administration; it is also known as add-on therapeutic administration.
  • Any and all treatment regimes in which a patient receives separate but coterminous or overlapping therapeutic administration of the compounds of formula (I) or a salt thereof and at least one antipsychotic agent, a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects or a cognitive enhancer are within the scope of the current invention.
  • a patient is typically stabilised on a therapeutic administration of one or more of the components for a period of time and then receives administration of another component.
  • the compounds of formula (I) or a salt thereof may be administered as adjunctive therapeutic treatment to patients who are receiving administration of at least one antipsychotic agent, a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects or a cognitive enhancer, but the scope of the invention also includes the adjunctive therapeutic administration of at least one antipsychotic agent, a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects or a cognitive enhancer to patients who are receiving administration of compounds of formula (I) or a salt thereof.
  • the combination therapies of the invention may also be administered simultaneously.
  • simultaneous administration is meant a treatment regime wherein the individual components are administered together, either in the form of a single pharmaceutical composition or device comprising or containing both components, or as separate compositions or devices, each comprising one of the components, administered simultaneously.
  • Such combinations of the separate individual components for simultaneous combination may be provided in the form of a kit-of-parts.
  • the invention discloses a method of treatment of a Psychotic disorder by adjunctive therapeutic administration of a compound of formula (I) or a salt thereof to a patient receiving therapeutic administration of at least one antipsychotic agent.
  • the invention provides the use of a compound of formula (I) or a salt thereof in the manufacture of a medicament for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of at least one antipsychotic agent.
  • the invention further provides a compound of formula (I) or a salt thereof for use for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of at least one antipsychotic agent.
  • the invention discloses a method of treatment of a psychotic disorder by adjunctive therapeutic administration of at least one antipsychotic agent to a patient receiving therapeutic administration of a compound of formula (I) or a salt thereof.
  • the invention provides the use of at least one antipsychotic agent in the manufacture of a medicament for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of a compound of formula (I) or a salt thereof.
  • the invention further provides at least one antipsychotic agent for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of a compound of formula (I) or a salt thereof.
  • the invention discloses a method of treatment of a psychotic disorder by simultaneous therapeutic administration of a compound of formula (I) or a salt thereof in combination with at least one antipsychotic agent.
  • the invention further provides the use of a combination of a compound of formula (I) or a salt thereof and at least one antipsychotic agent in the manufacture of a medicament for simultaneous therapeutic administration in the treatment of a psychotic disorder.
  • the invention further provides the use of a compound of formula (I) or a salt thereof in the manufacture of a medicament for simultaneous therapeutic administration with at least one antipsychotic agent in the treatment of a psychotic disorder.
  • the invention further provides a compound of formula (I) or a salt thereof for use for simultaneous therapeutic administration with at least one antipsychotic agent in the treatment of a psychotic disorder.
  • the invention further provides the use of at least one antipsychotic agent in the manufacture of a medicament for simultaneous therapeutic administration with a compound of formula (I) or a salt thereof in the treatment of a psychotic disorder.
  • the invention provides a kit-of-parts for use in the treatment of a psychotic disorder comprising a first dosage form comprising a compound of formula (I) or a salt thereof and one or more further dosage forms each comprising an antipsychotic agent for simultaneous therapeutic administration.
  • the invention discloses method of treatment of a psychotic disorder by adjunctive therapeutic administration of a compound of the present invention to a patient receiving therapeutic administration of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • the invention provides the use of a compound of the present invention in the manufacture of a medicament for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • the invention also provides the use of a compound of the present invention in adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • the invention further provides the use of a compound of the present invention for use for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • the invention discloses method of treatment of a psychotic disorder by adjunctive therapeutic administration of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer to a patient receiving therapeutic administration of a compound of the present invention.
  • the invention provides the use of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the manufacture of a medicament for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of a compound of the present invention.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the manufacture of a medicament for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of a compound of the present invention.
  • the invention also provides the use of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of a compound of the present invention.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for adjunctive therapeutic administration for the treatment of a psychotic disorder in a patient receiving therapeutic administration of a compound of the present invention.
  • the invention discloses a method of treatment of a psychotic disorder by simultaneous therapeutic administration of a compound of the present invention in combination with an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer.
  • the invention further discloses the use of a combination of a compound of the present invention and an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the manufacture of a medicament for simultaneous therapeutic administration in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the manufacture of a medicament for simultaneous therapeutic administration in the treatment of a psychotic disorder.
  • the invention further discloses the use of a combination of a compound of the present invention and an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for simultaneous therapeutic administration in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for simultaneous therapeutic administration in the treatment of a psychotic disorder.
  • the invention further provides the use of a compound of the present invention in the manufacture of a medicament for simultaneous therapeutic administration with an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the treatment of a psychotic disorder.
  • the invention further discloses the use of a compound of the present invention for simultaneous therapeutic administration with an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the treatment of a psychotic disorder.
  • the invention further provides a compound of the present invention for use for simultaneous therapeutic administration with an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the treatment of a psychotic disorder.
  • the invention further provides the use of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the manufacture of a medicament for simultaneous therapeutic administration with a compound of the present invention in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer in the manufacture of a medicament for simultaneous therapeutic administration with a compound of the present invention in the treatment of a psychotic disorder.
  • the invention further discloses the use of an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for simultaneous therapeutic administration with a compound of the present invention in the treatment of a psychotic disorder.
  • an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for simultaneous therapeutic administration with a compound of the present invention in the treatment of a psychotic disorder.
  • the invention provides a kit-of-parts for use in the treatment of a psychotic disorder comprising a first dosage form comprising a compound of the present invention and one or more further dosage forms each comprising an active ingredient selected from the group consisting of: a mood stabiliser, an antidepressant, an anxiolytic, a drug for extrapyramidal side effects and a cognitive enhancer for simultaneous therapeutic administration.
  • antipsychotic drugs examples include, but are not limited to: sodium channel blockers; mixed 5HT/dopamine receptor antagonists; mGluR5 positive modulators; D3 antagonists; 5HT6 angatonists; nicotinic alpha-7 modulators; glycine transporter GlyT1 inhibitors; D2 partial agonist/D3 antagonist/H3 antagonists; AMPA modulators; NK3 antagonists such as osanetant and talnetant; an atypical antipsychotic, for example clozapine, olanzapine, risperidone, quetiapine, aripirazole, ziprasidone and amisulpride; butyrophenones, such as haloperidol, pimozide, and droperidol; phenothiazines, such as chlorpromazine, thioridazine, mesoridazine, trifluoperazine, perphenazine, fluphenazine
  • tradenames and suppliers of selected antipsychotic drugs that may be suitable for use in the present invention are as follows : clozapine (available under the tradename CLOZARILTM, from Mylan, Zenith Goldline, UDL, Novartis); olanzapine (available under the tradename ZYPREXATM, from Lilly ; ziprasidone (available under the tradename GEODONTM, from Pfizer); risperidone (available under the tradename RISPERDALTM, from Janssen); quetiapine fumarate (available under the tradename SEROQUELTM, from AstraZeneca); sertindole (available under the tradename SERLECTTM); amisulpride (available under the tradename SOLIONTM, from Sanofi-Synthelabo); haloperidol (available under the tradename HALDOLTM, from Ortho-McNeil); haloperidol decanoate (available under the tradename HALDOL decanoate
  • antipsychotic drugs include promazine (available under the tradename SPARINETM), triflurpromazine (available under the tradename VESPRINTM), chlorprothixene (available under the tradename TARACTANTM), droperidol (available under the tradename INAPSINETM), acetophenazine (available under the tradename TINDALTM), prochlorperazine (available under the tradename COMPAZINETM), methotrimeprazine (available under the tradename NOZINANTM), pipotiazine (available under the tradename PIPOTRILTM), iloperidone, pimozide and flupenthixol.
  • promazine available under the tradename SPARINETM
  • triflurpromazine available under the tradename VESPRINTM
  • chlorprothixene available under the tradename TARACTANTM
  • droperidol available under the tradename INAPSINETM
  • acetophenazine available under the tradename TINDALTM
  • suitable antipsychotic agents include olanzapine, risperidone, quetiapine, aripiprazole, haloperidol, clozapine, ziprasidone, talnetant and osanetant.
  • Mood stabilisers which may be used in the therapy of the present invention include lithium, sodium valproate/valproic acid/divalproex, carbamazepine, lamotrigine, gabapentin, topiramate, oxcarbazepine and tiagabine.
  • Antidepressant drugs which may be used in the therapy of the present invention include serotonin antagonists, CRF-1 antagonists, Cox-2 inhibitor/SSRI dual antagonists; dopamine/noradrenaline/serotonin triple reuptake inhibitors; NK1 antagonists; NK1 and NK2 dual antagonists; NK1/SSRI dual antagonists; NK2 antagonists; serotonin agonists (such as rauwolscine, yohimbine and metoclopramide); serotonin reuptake inhibitors (such as citalopram, escitalopram, fluoxetine, fluvoxamine, femoxetine, indalpine, zimeldine, paroxetine and sertraline); dual serotonin/noradrenaline reuptake inhibitors (such as venlafaxine, reboxetine, duloxetine and milnacipran); Noradrenaline reuptake inhibitors (such as reboxetine);
  • Anxiolytics which may be used in the therapy of the present invention include V1 b antagonists, 5HT 7 antagonists and benzodiazepines such as alprazolam and lorazepam.
  • Drugs for extrapyramidal side effects which may be used in the therapy of the present invention include anticholinergics (such as benztropine, biperiden, procyclidine and trihexyphenidyl), antihistamines (such as diphenhydramine) and dopaminergics (such as amantadine).
  • anticholinergics such as benztropine, biperiden, procyclidine and trihexyphenidyl
  • antihistamines such as diphenhydramine
  • dopaminergics such as amantadine
  • Cognitive enhancers which may be used in the therapy of the present invention include example cholinesterase inhibitors (such as tacrine, donepezil, rivastigmine and galantamine), H3 antagonists and muscarinic M1 agonists (such as cevimeline).
  • cholinesterase inhibitors such as tacrine, donepezil, rivastigmine and galantamine
  • H3 antagonists such as muscarinic M1 agonists (such as cevimeline).
  • the active ingredient for use in combination with a compound of the present invention is an atypical antipsychotic, for example clozapine, olanzapine, risperidone, quetiapine, aripirazole, ziprasidone or amisulpride.
  • the active ingredient for use in combination with a compound of the present invention is a typical antipsychotic, for example chlorpromazine, thioridazine, mesoridazine, fluphenazine, perphenazine, prochlorperazine, trifluoperazine, thiothixine, haloperidol, thiflurpromazine, pimozide, droperidol, chlorprothixene, molindone or loxapine.
  • a typical antipsychotic for example chlorpromazine, thioridazine, mesoridazine, fluphenazine, perphenazine, prochlorperazine, trifluoperazine, thiothixine, haloperidol, thiflurpromazine, pimozide, droperidol, chlorprothixene, molindone or loxapine.
  • the active ingredient for use in combination with a compound of the present invention is a mood stabiliser, for example lithium, sodium valproate/valproic acid/divalproex, carbamazepine, lamotrigine, gabapentin, topiramate, oxcarbazepine or tiagabine.
  • a mood stabiliser for example lithium, sodium valproate/valproic acid/divalproex, carbamazepine, lamotrigine, gabapentin, topiramate, oxcarbazepine or tiagabine.
  • the active ingredient for use in combination with a compound of the present invention is an antidepressant, for example a serotonin agonist (such as rauwolscine, yohimbine or metoclopramide); a serotonin reuptake inhibitor (such as citalopram, escitalopram, fluoxetine, fluvoxamine, femoxetine, indalpine, zimeldine, paroxetine or sertraline); a dual serotonin/noradrenaline reuptake inhibitor (such as venlafaxine, reboxetine, duloxetine or milnacipran); a noradrenaline reuptake inhibitors (such as reboxetine); a tricyclic antidepressants (such as amitriptyline, clomipramine, imipramine, maprotiline, nortriptyline or trimipramine); a monoamine oxidase inhibitor (such as isocarboxazide), a
  • the compounds of the present invention are usually administered as a standard pharmaceutical composition.
  • the present invention therefore provides in a further aspect a pharmaceutical composition comprising a compound of formula (I) as hereinbefore described or a salt thereof and a pharmaceutically acceptable carrier or excipient.
  • the pharmaceutical composition can be for use in the treatment of any of the conditions described herein.
  • the compounds of the invention may be administered by any convenient method, for example by oral, parenteral (e.g. intravenous), buccal, sublingual, nasal, rectal or transdermal administration and the pharmaceutical compositions adapted accordingly.
  • the compounds of the invention which are active when given orally can be formulated as liquids or solids, for example syrups, suspensions or emulsions, tablets, capsules and lozenges.
  • a liquid formulation will generally consist of a suspension or solution of the compound or salt in a suitable liquid carrier(s) for example an aqueous solvent such as water, ethanol or glycerine, or a non-aqueous solvent, such as polyethylene glycol or an oil.
  • a suitable liquid carrier(s) for example an aqueous solvent such as water, ethanol or glycerine, or a non-aqueous solvent, such as polyethylene glycol or an oil.
  • the formulation may also contain a suspending agent, preservative, flavouring or colouring agent.
  • a composition in the form of a tablet can be prepared using any suitable pharmaceutical carrier(s) routinely used for preparing solid formulations.
  • suitable pharmaceutical carrier(s) include magnesium stearate, starch, lactose, sucrose and cellulose.
  • a composition in the form of a capsule can be prepared using routine encapsulation procedures.
  • pellets containing the active ingredient can be prepared using standard carriers and then filled into a hard gelatin capsule; alternatively, a dispersion or suspension can be prepared using any suitable pharmaceutical carrier(s), for example aqueous gums, celluloses, silicates or oils and the dispersion or suspension then filled into a soft gelatin capsule.
  • Typical parenteral compositions consist of a solution or suspension of the compound or salt in a sterile aqueous carrier or parenterally acceptable oil, for example polyethylene glycol, polyvinyl pyrrolidone, lecithin, arachis oil or sesame oil.
  • a sterile aqueous carrier or parenterally acceptable oil for example polyethylene glycol, polyvinyl pyrrolidone, lecithin, arachis oil or sesame oil.
  • the solution can be lyophilised and then reconstituted with a suitable solvent just prior to administration.
  • compositions for nasal administration may conveniently be formulated as aerosols, drops, gels and powders.
  • Aerosol formulations typically comprise a solution or fine suspension of the active substance in a pharmaceutically acceptable aqueous or non-aqueous solvent and are usually presented in single or multidose quantities in sterile form in a sealed container, which can take the form of a cartridge or refill for use with an atomising device.
  • the sealed container may be a unitary dispensing device such as a single dose nasal inhaler or an aerosol dispenser fitted with a metering valve which is intended for disposal once the contents of the container have been exhausted.
  • the dosage form comprises an aerosol dispenser
  • a propellant which can be a compressed gas such as compressed air or an organic propellant such as a fluorochlorohydrocarbon.
  • the aerosol dosage forms can also take the form of a pump-atomiser.
  • compositions suitable for buccal or sublingual administration include tablets, lozenges and pastilles, wherein the active ingredient is formulated with a carrier such as sugar and acacia, tragacanth, or gelatin and glycerin.
  • a carrier such as sugar and acacia, tragacanth, or gelatin and glycerin.
  • compositions for rectal administration are conveniently in the form of suppositories containing a conventional suppository base such as cocoa butter.
  • compositions suitable for transdermal administration include ointments, gels and patches.
  • the composition may be in unit dose form such as a tablet, capsule or ampoule.
  • Each dosage unit for oral administration may contain, for example, from 1 to 500 mg (and for parenteral administration contains, for example, from 0.1 to 50 mg) of a compound of the formula (I) or a salt thereof calculated as the free base.
  • the unit dose for oral administration contains from 50 to 450 mg. In a further embodiment the unit dose contains from 100 to 400 mg.
  • compositions of each of the components, or of the combination of the components is, for example, in the form of a unit dose.
  • NMR spectra were obtained at 298K, 303.2K or 300K, at the frequency stated using either a BrukerTM DPX400 or AV400 machine and run as a dilute solution of CDCl 3 unless otherwise stated. All NMR spectra were reference to tetramethylsilane (TMS ⁇ H 0, ⁇ c 0). All coupling constants are reported in hertz (Hz), and multiplicities are labelled s (singlet), bs, (broad singlet), d (doublet), t (triplet), q (quartet), dd (doublet of doublets), dt (doublet of triplets) and m (multiplet).
  • a number of the compounds were purified using a Mass Directed Auto-Purification System (MDAP) incorporating HPLC techniques and an appropriate mass spectrometer such as the Waters ® ZQ mass spectrometer.
  • MDAP Mass Directed Auto-Purification System
  • N-(4-cyano-2-methylphenyl)-2,2,2-trifluoroacetamide (Intermediate 1, 19.37 g, 85 mmol), sulfuryl dichloride (27.6 mL, 340 mmol) and diphenylperoxyanhydride (1.028 g, 4.24 mmol) were heated in carbon tetrachloride (210 mL) at 100°C for 3h. The mixture was cooled to room temperature and then the reaction mixture was poured into 2M HCl (350 mL).
  • N-[2-(chloromethyl)-4-cyanophenyl]-2,2,2-trifluoroacetamide as an orange oil, (25.54 g) which was used in the next step without further purification.
  • This oil was added to triphenylphosphine (26.2 g, 100 mmol) and the mixture was heated in toluene (300 mL) at 110°C for 3h.
  • MP-TMT resin (15 wt%) was then added and the slurry was stirred for 3 hrs at 40°C, cooled to 17-23°C, and then filtered through a pad of celite. The celite pad and resin were washed with MeOH (100 mL). The solution was concentrated to a minimum by vacuum distillation and n-propanol (200 mL) was added and concentrated to a minimum. Toluene (200 mL) was added and then cyclohexane (75 mL) and the slurry was allowed to stir for 2hrs at 17-23°C. The mixture was then cooled to 0-5°C and allowed to stir for 2hrs.
  • N-(4-cyano-2-methylphenyl)-2,2,2-trifluoroacetamide (Intermediate 1; 7.3 g, 32.0 mmol), NBS (5.98 g, 33.6 mmol), and benzoyl peroxide (70%) (1.162 g, 4.80 mmol) were added to carbon tetrachloride (150 mL).
  • the reaction mixture was then heated to reflux under argon for 4 days.
  • the reaction mixture was cooled to room temperature then NBS (0.5 eq, 3g) and benzoyl peroxide (0.075 eq, 0.581g) were added.
  • the reaction mixture was then heated to reflux for a further 18hrs.
  • reaction mixture was allowed to cool to room temperature then poured into 2M NaOH (100 mL). The organic layer was collected then washed with a solution of sodium metabisulfite (10 g in 100 mL water), dried (MgSO 4 ), filtered and the solvent removed. The resulting orange oil was then purified through a plug of silica gel eluting with 1-10% EtOAc:isoHexane. The desired fractions were then combined and evaporated to dryness to give a 1:1 mixture of the title compound and the starting material as an orange solid (9 g) which was then used in the next step without further purification.
  • N -[2-(bromomethyl)-4-cyanophenyl]-2,2,2-trifluoroacetamide (Intermediate 6, 6 g, 19.54 mmol) was dissolved in toluene (100 mL). Triphenylphosphine (5.12 g, 19.54 mmol) was added and the reaction mixture heated to 85°C under argon for 5hrs.
  • reaction mixture was then extracted with ethyl acetate (2 x 400mL) and the organic extracts where combined, dried (MgSO 4 ), filtered and the solvent was removed to give ( ⁇ 3-bromo-5-cyano-2-[(trifluoroacetyl)amino]phenyl ⁇ methyl)(triphenyl)phosphonium bromide as a crude product which was then used in the next reaction without further purification (37.2g); m/z (ES + ) 568 & 570 (M+1).
  • 6-(Trifluoromethyl)nicotinic acid (Sigma-Aldrich; 178 mg, 0.934 mmol) was stirred in DCM (10 mL). Oxalyl chloride (0.131 mL, 1.494 mmol) then DMF (2.89 ⁇ l, 0.037 mmol) were added and the reaction mixture was left to stir at room temperature for 2hrs under Argon. The reaction mixture was evaporated to dryness and the resulting residue was dissolved in DCM (10 mL).
  • the mixture was cooled to ⁇ 5°C and quenched by the addition of water (505 mL) slowly.
  • the pH was adjusted to 5-6 by adding 20 wt% K 3 PO 4 (2.9 L).
  • the mixture was diluted with EtOAc (3.2 L) and the temperature adjusted to 15-20°C.
  • the phases were separated and the organic mixture was washed sequentially with water (1.5 L) and then 5 wt% sodium bicarbonate solution (2.6 L).
  • the mixture was filtered and the solvent removed to minimum volume under vacuum.
  • Isopropyl alcohol (2.0 L) was added and the mixture filtered, and the solvent removed under vacuum two times.
  • Isopropyl alcohol (980 mL) was added and the mixture heated to 70-80°C.
  • Compound 1A was characterised as follows:
  • X-ray powder diffraction analysis was carried out using Cu K.alpha. radiation on Phillips X'pert Pro powder diffractometer, Model PW3040 Pro equipped with a Phillips X'Celerator RTMS (Real Time Multi Strip) detector. Data were collected in real time over a theta-two theta continuous scan at 32sec/0.00167degree/step from 2 degrees 2.theta. to 40 degrees 2.theta. The tube voltage and current were 40 kV and 40 mA
  • the XRPD pattern is shown in Figure 1 . Characteristic XRPD angles are recorded in the Table 1 below. The margin of error is approximately ⁇ 0.2° 2 ⁇ for each of the peak assignments. Peak positions were measured using PANalytical X'Pert Highscore Plus software. Table 1 Position 2 ⁇ /° ( ⁇ 0.2° 2 ⁇ ) 5.7 9.8 16.1 17.1 22.5 23.6 24.9 34.5
  • the Raman spectrum of Compound 1A was recorded with the sample placed on an Al coated microscope slide using a Nicolet 960 E.S.P. FT-Raman spectrometer, at 4 cm -1 resolution with excitation from a Nd:VO4 laser (1064 nm) with a power output of 433mW.
  • the Raman spectrum is shown in Figure 2 . Bands were observed at: 3270, 3205, 3116, 3091, 3072, 3050, 3028, 2944, 2929, 2881, 1660, 1634, 1604, 1564, 1496, 1458, 1442, 1394, 1368, 1333, 1315, 1291, 1248, 1228, 1166. 1135, 1090, 1066, 1035, 991, 947, 897, 865, 829, 793, 762, 731, 705, 675, 643, 613, 590, 547, 478, 454, 411, 374, 325, 280, 272, 242, 221, cm -1 .
  • the PAM activity of the compounds of the invention at the ⁇ 7 nAChR may be determined using the following cell-based calcium flux assay which uses a Fluorimetric Image Plate Reader (FLIPR) (see Schroeder et al.; J. Biomolecular Screening, 1 (2), p75-80, 1996 ).
  • FLIPR Fluorimetric Image Plate Reader
  • GH4Cl cell line stably transfected with human ⁇ 7 nAChR was suspended in a 384 well plate and incubated at 30°C for 48 h in a 5% carbon dioxide atmosphere. The growth media was removed and the cells washed three times with a solution of Hanks' balanced salt solution (HBSS), 20 mM HEPES and 2.5 mM probenecid leaving 20 ⁇ l washing solution in each well. A loading solution (20 ⁇ l) containing HBSS, probenecid, 1-4 ⁇ M Fluo4 AM (a calcium indicator dye) and pluronic acid was added and the plate incubated for 45 min at 37°C under an atmosphere free from carbon dioxide. The cells were washed three times leaving 30 ⁇ l in each well.
  • HBSS Hanks' balanced salt solution
  • pluronic acid was added and the plate incubated for 45 min at 37°C under an atmosphere free from carbon dioxide. The cells were washed three times
  • the plate containing the cells and calcium indicator dye were then transferred to the FLIPR.
  • the assay was initiated by collecting baseline datapoints at 10 second intervals followed by addition of the test compound in buffer solution (0.33% DMSO) and diluted to a final concentration of 10 ⁇ M and serial dilution of the wells, 1:2 or 1:3, gave a low concentration of ⁇ 1nM. Following a further 5-10 mins 10 ⁇ lof 50 ⁇ M nicotine was added and data collected for 2-3mins. Nicotine produced a rapid, transient and reproducible calcium flux which could be potentiated with the positive allosteric modulator test compounds.
  • the supporting compounds were screened using the assay described above and gave gave a pEC 50 of equal to or greater than 6.0 with a maximum potentiation of the response area to approximately 1200% relative to nicotine control.
  • Supporting compound 1 was screened using the assay described above and gave a pEC 50 of greater than 6 with a maximum potentiation of the response area to approximately 1200% relative to nicotine control.
  • In vivo assays with utility for the evaluation of activity of nicotinic ⁇ 7 receptor positive modulators include, but are not limited to: cognition assays in both na ⁇ ve and pharmacologically-impaired animals including delayed matching and non-matching to position, passive avoidance, novel object recognition, Morris water maze (or variants thereof), radial arm maze, five choice serial reaction time task, and cued / contextual fear conditioning; sensory gating assays in both na ⁇ ve and pharmacologically-impaired animals including pre-pulse inhibition of the startle reflex and auditory gating; and assays of drug- (e.g. amphetamine, morphine, phencyclidine) induced locomotor activity.
  • cognition assays in both na ⁇ ve and pharmacologically-impaired animals including delayed matching and non-matching to position, passive avoidance, novel object recognition, Morris water maze (or variants thereof), radial arm maze, five choice serial reaction time task,

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Claims (15)

  1. Verbindung der Formel (I) oder ein Salz derselben:
    Figure imgb0032
     wobei
    R1 Wasserstoff oder C1-3-Alkyl ist;
    R2 Wasserstoff, Halogen oder Cyano ist; und
    R3 die Gruppe
    Figure imgb0033
     ist, wobei Ra Halogen, C1-6-ARyl, C1-6-Akoxy, Halogen-C1-6-aRyl, Halogen-C1-6-alkoxy oder Cyano ist.
  2. . Verbindung nach Anspruch 1 oder ein Salz derselben, wobei R1 Wasserstoff ist,
  3. . Verbindung nach einem der vorangehenden Ansprüche oder ein Salz derselben, wobei R2 Wasserstoff ist.
  4. . Verbindung, die ausgewählt ist aus:
    N-[(2-Trifluormethyl-1H-indol-5-yl)methyl]-6-(trifluormethyl)-3-pyridincarboxamid;
    N-[(2-Trifluormethyl-1H-indol-5-yl)methyl]-6-(2,2,2-trifluorethoxy)-3-pyridincarboxamid;
    6-Brom-N-{[2-(trifluormethyl)-1H-indol-6-yl]methyl}-3-pyridincarboxamid;
    6-Cyano-N-{[2-(trifluormethyl)-1H-indol-5-yl]methyl}-3-pyridincarboxamid;
    N-[(2-Trifluormethyl-7-brom-1H-indol-5-yl)methyl]-6-(trifluormethyl)-3-pyridincarboxamid;
    N-[(2-Trifluormethyl-7-cyano-1H-indol-5-yl)methyl]-6-(trifluormethyl)-3-pyridincarboxamid;
    N- [(1-Methyl-2-trifluormethylindol-5 -yl)methyl] -6-(trifluormethyl)-3 -pyridincarboxamid;
    oder ein Salz derselben.
  5. . Salz nach einem der vorangehenden Ansprüche, wobei das Salz ein pharmazeutisch verträgliches Salz ist.
  6. . N-[(2-Trifluormethyl-1H-indol-5-yl)methyl]-6-(trifluormethyl)-3-pyridincarboxamid.
  7. . Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder ein pharmazeutisch verträgliches Salz derselben, zur Verwendung als ein Arzneimittel.
  8. . Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder ein pharmazeutisch verträgliches Salz derselben, zur Verwendung in der Behandlung einer psychotischen Störung.
  9. . Verbindung nach Anspruch 8 oder ein pharmazeutisch verträgliches Salz derselben, wobei die psychotische Störung Schizophrenie ist.
  10. . Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder ein pharmazeutisch verträgliches Salz derselben, zur Verwendung in der Behandlung einer kognitiven Beeinträchtigung.
  11. . Verwendung einer Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder eines pharmazeutisch verträglichen Salzes derselben, in der Herstellung eines Arzneimittels zur Behandlung einer psychotischen Störung.
  12. . Verwendung nach Anspruch 11, wobei die psychotische Störung Schizophrenie ist.
  13. . Verwendung einer Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder eines pharmazeutisch verträglichen Salzes derselben, in der Herstellung eines Arzneimittels zur Behandlung einer kognitiven Beeinträchtigung.
  14. . Pharmazeutische Zusammensetzung, umfassend a) eine Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder ein pharmazeutisch verträgliches Salz derselben, und b) einen oder mehr pharmazeutisch verträgliche(n) Träger oder Hilfsstoff(e).
  15. . Kombination, umfassend a) eine Verbindung, wie nach einem der Ansprüche 1 bis 6 definiert, oder ein pharmazeutisch verträgliches Salz derselben, und b) einen weiteren Wirkstoff.
EP09733402A 2008-04-17 2009-04-16 Indole als modulatoren des alpha-7-nikotinacetylcholinrezeptors Active EP2279184B1 (de)

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BRPI0911682A2 (pt) 2015-10-13
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WO2009127678A1 (en) 2009-10-22
ZA201006856B (en) 2011-06-29
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IL208574A0 (en) 2010-12-30
KR20100133016A (ko) 2010-12-20
US8377941B2 (en) 2013-02-19
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CA2721630A1 (en) 2009-10-22
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EP2279183B1 (de) 2012-08-08
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US20110034515A1 (en) 2011-02-10
CN102066356B (zh) 2014-06-11
AU2009237649A1 (en) 2009-10-22
BRPI0910585A2 (pt) 2015-09-22
WO2009127679A1 (en) 2009-10-22
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